Genesis 48:1-6

One day not long after this, word came to Joseph, “Your father is failing rapidly.” So Joseph went to visit his father, and he took with him his two sons, Manasseh and Ephraim. When Joseph arrived, Jacob was told, “Your son Joseph has come to see you.” So Jacob gathered his strength and sat up in his bed. Jacob said to Joseph, “God Almighty appeared to me at Luz in the land of Canaan and blessed me. He said to me, ‘I will make you fruitful, and I will multiply your descendants. I will make you a multitude of nations. And I will give this land of Canaan to your descendants after you as an everlasting possession.’ “Now I am claiming as my own sons these two boys of yours, Ephraim and Manasseh, who were born here in the land of Egypt before I arrived. They will be my sons, just as Reuben and Simeon are. But any children born to you in the future will be your own, and they will inherit land within the territories of their brothers Ephraim and Manasseh.